PREPARATION AND CHARACTERIZATION OF NANO-SIZED Pd- PdCuC FACTORS AND THEIR ELECTRO-ACTIVITY TOWARD ALCOHOL OXIDATION Composition

п»їPREPARATION AND PORTRAYAL OF NANO-SIZED Pd- PdCu/C CATALYSTS AND THEIR ELECTRO-ACTIVITY TOWARD

ALCOHOL OXIDATION PROCESS

Xuan Nam VO, Pham Anh Assiste a HO, Thi Giang Huong NGUYEN, Thi Phuong Thoa NGUYEN, Van Man TRAN and Thanh Thien CO* University of Science, VNU-Ho Chi Minh City. *E-mail: [email protected] edu. vn

Polyvinylpyrrolidone stabilized dep?t nanoparticles had been prepared by alcoholic beverages reduction in ethanol and ethylene glycol with the help of a hydrochloric acid catalyst. Furthermore, palladium and copper–palladium nanoparticles have also been electrochemically backed on vulcan XC72 nanostructured powders and all the nanomaterials have been seen as a several deductive techniques just like scanning electron microscope (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD) and ultraviolet–visible spectroscopy (UV-Vis). Their very own catalytic activities were scored by simple cyclic voltammetry. It confirmed satisfactory catalysis toward the methanol oxidation process reaction. Keywords and phrases: Electrocatalyst, nanoparticles, palladium, fuel cell. 1 . INTRODUCTION

Just lately, direct liquor fuel cell (DAFC) is a huge focus to get scientist interests because of several advantages, including light weight, abundant resource and environmental friendliness. Alcohols, such as methanol, ethanol, ethylene glycol, and glycerol, exhibit substantial volumetric strength density, and their storage and transport are easier when compared with hydrogen. Alternatively, the oxidation kinetics of any liquor are much slower and still H2-fueled polymer electrolyte fuel cellular material (PEMFCs) exhibit superior power performance as compared to DAFCs with comparable electroactive surface areas. 2, a few However , the anode catalyst is easily poisoned by carbon monoxide adsorption (COads) [1, 2] resulting in lowering of cellular efficiency as well as the barriers limit the development of the DMFC. Platinum eagle (Pt) is generally known as electrocatalyst for the electrooxidation of organic elements and corrosion resistance in strong acid solution [3, 4]. Methanol oxidation giving COMPANY species toxins the Pt active sites resulted in lowering of the Pt catalytic activity. Former studies reported that metal Meters (M is known as a precious or perhaps transition metal) in bimetal catalyst PtM could obtain oxygen with lower probability of accelerate the Pt–CO oxidation and withstand CO–Pt adsorbent [2, 5, 6]. PtRu is among the outstanding bimetal catalysts pertaining to the methanol electrooxidation with fine resistance for COMPANY adsorption [1]. Yet , there are additional metals possess recently been accustomed to prepare binary electrocatalysts. Recently platinum (Pt) nanoparticles [1-3] have been generally investigated because of its key applications in energy cell. Yet , the large loading of Pt in electrodes is actually a critical obstacle limiting the wide commercialization of gasoline cells [4, 5] since Pt is scarce and expensive. Hence, non-platinum centered catalysts found in fuel cells were considerably explored with an intention to find a great candidate to get Pt. Between these applicants reported so far, palladium contaminants, especially in alkaline media, were recognized as the right non-platinum catalysts for fresh air reduction reaction (ORR) [6], methanol Palladium nanoparticles could be produced through numerous methods including: sol-gel procedure [6], deposition by means of ion-exchange/adsorption [7], electrochemical method [5, 8], microwave sang[7, 9], sonochemical reduction [10] and etc. These methods suffer from a particular complexity and high cost. Therefore , using a straightforward method, activity of metal nanoparticles simply by loading a lot of liquid polymeric matrices, will probably be appropriate. Huang et ing. [11] produced phenanthroline-stabilized palladium nanoparticles spread in ionic liquid. Nevertheless , ionic water is not only expensive but likewise not yet recognized as an environmentally friendly medium [12-13]. Therefore , it is desirable to build up an alternative environmentally friendly medium rather than the risky and dangerous organic solvents. Pillai et al. [12]...



News

 Hills Just like White Elphants Essay

Hills Just like White Elphants Essay

The english language 102 12 October 2012 Human Experience Person if viewed from a distance in their life would virtually go through the basic…...

 If Only She Had Tune in to Me- Short Story Analysis Paper

If Only She Had Tune in to Me- Short Story Analysis Paper

Camaraderie is a feeling of love of one person another. Its not necessary to decide on whom to get your good friend, your best friend. The friendship between one…...

 The Baseball catchers In The Rye Dead Poets Soci Dissertation

The Baseball catchers In The Rye Dead Poets Soci Dissertation

п»їThe Catcher in the Rye/the Lifeless Poets Contemporary society The Catcher in the Rye/The Dead Poets Society Holden Caufield, narrator and main character inside the Catcher…...

 Benefits of Contract price Essay

Benefits of Contract price Essay

Who benefits from a contract price or subspecies? TARIFFS Rewards 1 . Local government through increased revenues. 2 . Domestic business due to…...

 Just-noticeable Difference and Sound Wave Dissertation

Just-noticeable Difference and Sound Wave Dissertation

Study Questions: 1 ) The physical properties of the stimulus will be translated in neural impulses in a method called A. Physical coding W. Transduction…...

 Discerning New Forms of Solidarity That Go above Nation, Faith, and Sociable Class Dissertation

Discerning New Forms of Solidarity That Go above Nation, Faith, and Sociable Class Dissertation

One thing that may be clearly noticeable is that individuals have regularly developed new forms of unification as we have started out roaming rings of sportsman and gatherers to a digital…...